## 从字典中提出出 子集
prices = {
    'ACME': 45.23,
    'AAPL': 612.78,
    'IBM': 205.55,
    'HPQ': 37.20,
    'FB': 10.75
}

p1={key: value for key, value in prices.items() if value > 200}
print(p1)

tech_names = ['ACME', 'AAPL', 'HPQ']
p2={key: value for key, value in prices.items() if key in tech_names}
print(p2)

